Patent US3247309A successfully refreshed from Google Patents.
US3247309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-automatic rhythm accompaniment
Assignee: DH Baldwin Co
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Filing: 1962-07-09
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Granted: 1966-04-19
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Expires: 1982-07-09
Abstract
No abstract record available.
Inventors
- 👤 Donald J Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:49
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/36; G10H1/40; G10H1/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A SYSTEM FOR SIMULATING PERCUSSION SOUNDS, COMPRISING A SOURCE OF ULTRASONIC SIGNALS MODULATED IN FREQUENCY AND AMPLITUDE BY AUDIO FREQUENCY NOISE, A NORMALLY DISABLED GATED DETECTOR CONNECTED IN CASCADE WITH SAID SOURCE, A SOURCE OF SHAPED GATING VOLTAGES RECURRING AT A DESIRED RECURRENCE RATE OF SAID PERCUSSIVE SOUNDS, SAID GATING VOLTAGES EACH HAVING A RELATIVELY RAPID RISE AND RELATIVELY SLOW EXPONENTIAL FALL, AND MEANS APPLYING SAID GATING VOLTAGES TO SAID GATED DETECTOR IN ENABLING RELATION, WHEREBY SHAPED BURSTS OF DETECTED VERSIONS OF SAID ULTRASONIC SIGNALS ARE PASSED BY SAID DETECTOR, AND AN ELECTROACOUSTIC TRANSDUCER RESPONSIVE TO SAID SHAPED BURSTS OF DETECTED VERSIONS OF SAID ULTRANSONIC SIGNALS.
Claim 2
Independent Claim
106 words
A SYSTEM FOR SIMULATING PERCUSSION SOUNDS, COMPRISING A SOURCE OF ULTRASONIC SIGNALS MODULATED IN FREQUENCY AND AMPLITUDE BY AUDIO FREQUENCY NOISE, A NORMALLY DISABLED GATED DETECTOR CONNECTED IN CASCADE WITH SAID SOURCE, A SOURCE OF SHAPED GATING VOLTAGES RECURRING AT A DESIRED RECURRENCE RATE OF SAID PERCUSSIVE SOUNDS, SAID GATING VOLTAGES EACH HAVING A RELATIVELY RAPID RISE AND RELATIVELY SLOW EXPONENTIAL FALL, AND MEANS APPLYING SAID GATING VOLTAGES TO SAID GATED DETECTOR IN ENABLING RELATION, WHEREBY SHAPED BURSTS OF DETECTED VERSIONS OF SAID ULTRASONIC SIGNALS ARE PASSED BY SAID DETECTOR, AND AN ELECTROACOUSTIC TRANSDUCER RESPONSIVE TO SAID SHAPED BURSTS OF DETECTED VERSIONS OF SAID ULTRANSONIC SIGNALS.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |